The bond between hydrogen and bromine molecules is broken and bond formation takes place between hydrogen and bromine atoms to form $\mathrm{HBr}$

One mole of hydrogen and bromine reacts to give 2 moles of $\mathrm{HBr}$

 $\Delta H^0=\Delta H_{H-H}+\Delta H_{Br-Br}-\Delta H_{H-Br}$

 $\Delta H^0=433+192-2\left(364\right)$

 $\Delta H^0=625-728=-103$

Hence correct answer will be (D).